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If a piece of bone such as femur of frog...

If a piece of bone such as femur of frog is kept in dilute HCl for about a week . It will

A

assume black colour

B

shrink in size

C

turn flexible

D

crack into pieces

Text Solution

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The correct Answer is:
c
When a bone is kept in dilute acid for a few days, the salts get dissolved, leaving only soft and flexible organic matrix (decalcification). If kept in KOH, it remains unaffected, only the surrounding muscles and connective tissue get dissolved so that the bone now appears clean. If burned, the organic matter bums off producing smoke and the ash (mineral matter) is left behind
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